INFO: task kworker/u8:1:14 blocked for more than 143 seconds. Not tainted 6.15.0-rc2-syzkaller-gc72692105976 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:1 state:D stack:0 pid:14 tgid:14 ppid:2 task_flags:0x4208160 flags:0x00000008 Workqueue: events_power_efficient reg_check_chans_work Call trace: __switch_to+0x414/0x788 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0x16a4/0x2c80 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6860 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6917 __mutex_lock_common+0xda8/0x2604 kernel/locking/mutex.c:678 __mutex_lock kernel/locking/mutex.c:746 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:798 class_wiphy_constructor include/net/cfg80211.h:6092 [inline] reg_leave_invalid_chans net/wireless/reg.c:2471 [inline] reg_check_chans_work+0x134/0xe2c net/wireless/reg.c:2486 process_one_work+0x810/0x1638 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x97c/0xf08 kernel/workqueue.c:3400 kthread+0x674/0x7dc kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 INFO: task kworker/u8:1:14 is blocked on a mutex likely owned by task kworker/u8:0:12. task:kworker/u8:0 state:R running task stack:0 pid:12 tgid:12 ppid:2 task_flags:0x4208060 flags:0x00000008 Workqueue: events_unbound cfg80211_wiphy_work Call trace: __switch_to+0x414/0x788 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0x16a4/0x2c80 kernel/sched/core.c:6767 preempt_schedule_common+0xe8/0x1dc kernel/sched/core.c:6947 preempt_schedule+0x60/0x80 kernel/sched/core.c:6971 __local_bh_enable_ip+0x244/0x44c kernel/softirq.c:414 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline] _raw_spin_unlock_bh+0x3c/0x4c kernel/locking/spinlock.c:210 spin_unlock_bh include/linux/spinlock.h:396 [inline] cfg80211_inform_single_bss_data+0x1144/0x1a00 net/wireless/scan.c:2383 cfg80211_inform_bss_data+0x2dc/0x4650 net/wireless/scan.c:3222 cfg80211_inform_bss_frame_data+0x300/0x6fc net/wireless/scan.c:3317 ieee80211_bss_info_update+0x700/0x9d0 net/mac80211/scan.c:226 ieee80211_rx_bss_info net/mac80211/ibss.c:1102 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1581 [inline] ieee80211_ibss_rx_queued_mgmt+0x858/0x2798 net/mac80211/ibss.c:1608 ieee80211_iface_process_skb net/mac80211/iface.c:1622 [inline] ieee80211_iface_work+0x710/0xd94 net/mac80211/iface.c:1676 cfg80211_wiphy_work+0x2cc/0x508 net/wireless/core.c:435 process_one_work+0x810/0x1638 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x97c/0xf08 kernel/workqueue.c:3400 kthread+0x674/0x7dc kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 Showing all locks held in the system: 1 lock held by kthreadd/2: 3 locks held by kworker/u8:0/12: 4 locks held by kworker/u8:1/14: #0: ffff0000c0031948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3212 #1: ffff800098257b80 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3212 #2: ffff800093071868 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000d4630768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6092 [inline] #3: ffff0000d4630768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_leave_invalid_chans net/wireless/reg.c:2471 [inline] #3: ffff0000d4630768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_check_chans_work+0x134/0xe2c net/wireless/reg.c:2486 1 lock held by khungtaskd/32: #0: ffff800090118020 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 3 locks held by kworker/u8:2/44: 3 locks held by kworker/u8:3/45: 1 lock held by pr/ttyAMA0/46: 7 locks held by kworker/u8:4/62: 6 locks held by kworker/u8:5/486: 3 locks held by kworker/u8:6/535: 3 locks held by kworker/u8:7/620: 3 locks held by kworker/u8:8/669: 3 locks held by kworker/u8:9/763: 3 locks held by kworker/u8:10/825: 3 locks held by kworker/R-ipv6_/4128: #0: ffff0000d2137948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3212 #1: ffff8000a26f7b20 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3212 #2: ffff800093071868 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by kworker/R-bat_e/4209: 1 lock held by jbd2/nvme0n1p2-/6053: 2 locks held by syslogd/6073: 3 locks held by udevd/6088: 1 lock held by dhcpcd/6141: 3 locks held by dhcpcd/6142: 2 locks held by getty/6231: #0: ffff0000cd4440a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009c1be2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x46c/0x123c drivers/tty/n_tty.c:2222 3 locks held by syz-executor/6460: 3 locks held by kworker/0:3/6462: 3 locks held by syz-executor/6471: 1 lock held by syz-executor/6476: #0: ffff800093071868 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by syz-executor/6478: 2 locks held by syz-executor/6482: 3 locks held by kworker/0:4/6526: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3212 #1: ffff8000a10d7b80 (reg_work){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3212 #2: ffff800093071868 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by syz.3.141/6955: 2 locks held by kworker/u8:11/6986: 3 locks held by kworker/u8:12/6987: 3 locks held by kworker/u8:13/6988: 2 locks held by syz-executor/6989: =============================================